These are excerpts and elaborations from my book "The Nature of Consciousness"
The British zoologist Mark
Ridley makes a distinction between the
macroscopic effects and the microscopic causes of animal behavior. The puzzling feature of the
animal world is that animals often help each other, and sometimes some
individuals would sacrifice their lives to save others. This would not make any
sense if the goal were merely for the body to survive. Altruism was explained by
Richard Dawkins with the idea that evolution applied to genes, not to bodies.
Bodies are the vehicles that genes use to attain everlasting life. Bodies are
disposable. Genes are not used by organisms, genes use organisms. I am nothing
but a machine invented by a bunch of genes to maximize their chances (not mine)
to survive. I will die. But if I am fit
and make children, my genes will survive me.
And if my children are fit, they will die but those genes will continue
to exist in other bodies, generation after generation. It's the genes, not the
organisms. Darwin's idea of competition among
individuals for survival must be slightly modified: it is not individuals that
compete, it is genes. In order to
maximize its chances of survival, a gene would cause one of its bodies (one of
the bodies that contain that gene) to help its "kin" (bodies with the
same gene). The macroscopic effect would be cooperation among organisms, while
at the microscopic level that cooperation is truly an attempt by the gene to
outsmart other genes, i.e. it is competition of the most cynical kind. You have to think like a
gene, not like a body. If you are a gene, you have no problem sacrificing some
of your bodies to save some others. Your ultimate goal is to survive (you are
the gene) and you can use any of those bodies as vehicles to continue your
journey through time. Altruism makes as
much sense as selfishness in the classical Darwinian theory, as long as you
look at the micro-world, not just at the animal kingdom (the macro-world) as we
(bodies) see it. In mathematical terms, sex
provides a way for a gene to participate in a lottery a number of times: each
body is a participant in the lottery of survival. The more bodies, the more
chances to win the lottery. This is a special lottery,
though. Winning this lottery entails some work (creating and maneuvering the
organism) and this work must be done jointly with other genes. Sex is the process
by which a gene is chosen to work in a body together with other genes. In each offspring the gene
is working with a different set of genes. Each offspring is a combination of
genes. Some of those combinations will prevail, i.e. they will generate an
organism that is capable of surviving in the environment. The gene has a vested interest in that as
many as possible of those offspring survive.
If you are one of those offspring, you think that it is all about you.
But, in reality, it is all about the genes that are inside you, and that you
share with your siblings (and some with your cousins, and some with your entire
tribe, and some with the entire human kind). If you are a gene shared by
my brother and me, it makes perfect sense that i give my life to save my
brother's children. I am not jeopardizing my chances of survival: i am
maximizing your chances of survival. Matt Ridley sides with Dawkins in thinking that the gene is
the unit of selection and in believing that genes are selfish; but Ridley shows
that it is in their interest to form alliances, because that may increase the
chances of survival for their genetic pool. Cooperation is actually a recurring
theme at all levels of the biological world, from cells to species. Ridley
explains cooperation among organisms of different species by using game theory:
whenever the mathematics of benefits outweighs the mathematics of competition, organisms tend to be
cooperative. Therefore, Ridley believes that social behavior, such as
cooperation, trade, religion, is a direct consequence of evolution. Back to the beginning of the chapter "Altruism" | Back to the index of all chapters |
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